Evaluating stereoscopic displays: both efficiency measures and perceived workload sensitive to manipulations in binocular disparity

Maurice H.P.H. van Beurden; Wijnand A. Ijsselsteijn; Yvonne A.W. de Kort

doi:10.1117/12.872566

15 February 2011 Evaluating stereoscopic displays: both efficiency measures and perceived workload sensitive to manipulations in binocular disparity

Maurice H.P.H. van Beurden, Wijnand A. Ijsselsteijn, Yvonne A.W. de Kort

Author Affiliations +

Proceedings Volume 7863, Stereoscopic Displays and Applications XXII; 786316 (2011) https://doi.org/10.1117/12.872566
Event: IS&T/SPIE Electronic Imaging, 2011, San Francisco Airport, California, United States

Abstract

Stereoscopic displays are known to offer a number of key advantages in visualizing complex 3D structures or datasets. The large majority of studies that focus on evaluating stereoscopic displays for professional applications use completion time and/or the percentage of correct answers to measure potential performance advantages. However, completion time and accuracy may not fully reflect all the benefits of stereoscopic displays. In this paper, we argue that perceived workload is an additional valuable indicator reflecting the extent to which users can benefit from using stereoscopic displays. We performed an experiment in which participants were asked to perform a visual path-tracing task within a convoluted 3D wireframe structure, varying in level of complexity of the visualised structure and level of disparity of the visualisation. The results showed that an optimal performance (completion time, accuracy and workload), depend both on task difficulty and disparity level. Stereoscopic disparity revealed a faster and more accurate task performance, whereas we observed a trend that performance on difficult tasks stands to benefit more from higher levels of disparity than performance on easy tasks. Perceived workload (as measured using the NASA-TLX) showed a similar response pattern, providing evidence that perceived workload is sensitive to variations in disparity as well as task difficulty. This suggests that perceived workload could be a useful concept, in addition to standard performance indicators, in characterising and measuring human performance advantages when using stereoscopic displays.

Citation Download Citation

Maurice H.P.H. van Beurden, Wijnand A. Ijsselsteijn, and Yvonne A.W. de Kort "Evaluating stereoscopic displays: both efficiency measures and perceived workload sensitive to manipulations in binocular disparity", Proc. SPIE 7863, Stereoscopic Displays and Applications XXII, 786316 (15 February 2011); https://doi.org/10.1117/12.872566

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